单项选择题

The price of vegetables varies according to the weather.（）

A．changes
B．rises
C．falls
D．jumps

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单项选择题
Parents should realize that example is better than precept. （）

A．instruction
B．education
C．imagination
D．morality
单项选择题
Mary was one of the principal organizers of the Artists Guild.（）

A．planners
B．employees
C．actors
D．recipients
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